Collapsible cheese container

ABSTRACT

Embodiments of the present invention provide collapsible cheese mold that eliminates or reduce the shortcomings of prior collapsible cheese molds. One embodiment of the present invention includes a container for transporting cheese, comprising a base and four wall panels mounted on the base, each side wall comprising an inner surface, an outer surface and two end faces. A first two of the wall panels comprise a set of hooks protruding from the end faces and a second two of the wall panels comprise hook receivers. Each hook receiver defines an opening through a corresponding wall panel inner surface and comprises a receiver rib spanning the width of the opening. A receiver rib has an outer face to engage an inner face of the respective hook. Each opening and receiver rib is sized to allow a portion of the respective hook to pass over the receiver rib.

RELATED APPLICATIONS

The present application, under 35 USC §119(e), claims the benefit ofpriority to U.S. Provisional Patent Application No. 60/677,171, entitled“Plastic Cheese Form and Transport Box,” by Ditter, filed May 3, 2005,which is hereby fully incorporated by reference herein.

TECHNICAL FIELD OF THE INVENTION

The present invention relates to collapsible containers. Moreparticularly, embodiments of the present invention relate to collapsibleand reusable container used for bulk cheese transport.

BACKGROUND OF THE INVENTION

Currently, cheese manufactures use plywood, metal and a small number ofplastic re-usable containers to ship cheese. Each of these containerssuffers a variety of shortcomings, as described below.

The predominant container in the industry for shipping bulk cheese is aplywood box with metal frame components. Typically, a set of plywoodwalls, including top and bottom sections, are connected together to forma square or rectangular box. Because the cheese can assert significantpressure on the walls, metal bands on the outside of the walls are usedto prevent or reduce bowing of the walls. Because this container is madeof wood, which is porous, and steel, which can rust, the surfaces mustbe resealed for hygienic reasons. This is done by coating the woodcomponents with wax and stripping the paint from the metal componentsand repainting. When the cheese reaches its destination, the cheese boxis broken down and shipped back to the cheese manufacturer for reuse.However, the wax must be stripped and re-applied before the returnablecontainer is reused. This is a time intensive process that is oftenperformed at third party facilities. Additionally, popular versions ofthis wood/metal container weigh approximately 118 lbs. and are difficultto assemble. The weight of the container does not allow a full truckloadof cheese to be shipped because gross trailer weights are exceeded priorto the truck being full.

Metal containers made from stainless steel are sometimes used in theindustry, but are restricted to in-plant use. This usage limitation isbecause the container is extremely expensive, heavy, dents easily anddoes not collapse for return shipment to point of origin.

Plastic containers manufactured using the low pressure structural foamprocess and molded from polycarbonate material represent approximately1% of the market (circa 2005). One example of such as container isdescribed in U.S. Pat. No. 5,287,981 to Wheeler. The known issues withcommercial implementations of this cheese box are: (i) liquid whey getstrapped in the ribs of the lid and sidewalls; (ii) the container issusceptible to stress cracking because of the foam molding process;(iii) the finished surface of a structural foam part is not easilycleaned because it is not sufficiently smooth; and (iv) a 4 ft. long prybar is typically required to open the container to access the cheese ora capital intensive automated opener can be used, requiring utilizing afork truck to put the container in the device. As a subsidiary problem,if stress cracks do form in the plastic when cheese is in the box,cheese can enter the cracks. When the cheese is removed from the box,the cracks can reseal, trapping some residual amount of cheese. Thecheese trapped in the sealed cracks can be difficult to remove, makingreuse of the cheese box unhygienic. Furthermore, the use of a large prybar to open the containers often causes damage to the containers.

As another deficiency of existing containers is that they make use of 6to 8 steel coil springs that keep the cheese compressed during storageand transport. The springs are difficult to separate from one anotherwhen shipped back to point of origin and re-coated with wax.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide collapsible cheese moldthat eliminates or reduces the shortcomings of prior collapsible cheesemolds. One embodiment of the present invention includes a container fortransporting cheese, comprising a base and four wall panels mounted onthe base, each side wall comprising an inner surface, an outer surfaceand two end faces. A first two of the wall panels comprise a set ofhooks protruding from the end faces and a second two of the wall panelscomprise hook receivers. Each hook receiver defines an opening through acorresponding wall panel inner surface and comprises a receiver ribspanning the width of the opening. A receiver rib has an outer face toengage an inner face of the respective hook. Each opening and receiverrib is sized to allow a portion of the respective hook to pass over thereceiver rib. The sidewalls interlock using manual force and no tools.

Another embodiment of the present invention comprises a container fortransporting cheese substantially formed from molded plastic. Thecontainer comprises a base having at least one upwardly extending baserib, four wall panels mounted on the base and aligned by the at leastone upwardly extending base rib, each side wall comprising an innersurface, a ribbed outer surface and two end faces, a lid having an outerlip and defining a cavity, wherein the outer lip of the lid fits on theoutside of the four wall panels when the lid is in place, a plurality ofleaf springs contacting an underside of the lid and a pressboard havinga top surface contacting the plurality of leaf springs. The first two ofthe wall panels comprise a set of hooks protruding from the end facesand a second two of the wall panels comprise hook receivers. Each hookreceiver defines an opening through a corresponding wall panel innersurface and comprises a receiver rib spanning the width of the opening.Each receiver rib has an outer face to engage an inner face of therespective hook. Each receiver is sized to allow at least a portion ofthe respective hook to pass over the receiver rib. Embodiments of thepresent invention provide an advantage by providing a collapsiblecontainer that can be easily broken down with a hand tool withoutdamaging the container.

Embodiments of the present invention provide another advantage reducingthe weight of the cheese mold, allowing more molds to be transported pershipment.

Embodiments of the present invention provide yet another advantage byproviding a spring design that does not require detangling.

BRIEF DESCRIPTION OF THE FIGURES

A more complete understanding of the present invention and theadvantages thereof may be acquired by referring to the followingdescription, taken in conjunction with the accompanying drawings inwhich like reference numbers indicate like features and wherein:

FIG. 1 is a diagrammatic representation of one embodiment of acollapsible cheese mold;

FIG. 2 is a diagrammatic representation of one embodiment of a latchingmechanism for a cheese mold;

FIG. 3 is a diagrammatic representation of another view of theembodiment of the latching mechanism for the cheese mold; and

FIG. 4 is a diagrammatic representation of one embodiment of collapsinga cheese mold;

FIG. 5 is a diagrammatic representation of one embodiment of a base of acollapsible mold;

FIG. 6 is a diagrammatic representation of one embodiment of a wallpanel of a collapsible cheese mold having hooks;

FIG. 7 is a diagrammatic representation of one embodiment of a wallpanel of a collapsible cheese mold having hook receivers;

FIGS. 8 a and 8 b are diagrammatic representations of one embodiment ofa lid for a cheese mold;

FIG. 9 is a diagrammatic representation of one embodiment of apressboard for a cheese mold; and

FIG. 10 is a diagrammatic representation of one embodiment of anassembled cheese mold.

DETAILED DESCRIPTION

Preferred embodiments of the invention are illustrated in the FIGURES,like numerals being used to refer to like and corresponding parts of thevarious drawings.

Embodiments of the present invention provide a re-usable, collapsible,plastic container for the bulk cheese industry with improved ergonomicsand cheese processing and shipping features. Various embodiments of thepresent invention provide advantages over prior art cheese containersystems and methods by eliminating six coil springs that requiredetangling with each use, improving ergonomics by reducing the weight ofthe container, reducing transportation costs by allowing at least anadditional two blocks of cheese per truckload, providing componentsdesigned to stack and nest thereby reducing transportation costs furtherby allowing 510 empty plastic containers to be returned per truckinstead of 360 containers with the existing wood/metal system; using anon-porous smooth surface eliminates the need to require third party waxremoval and reapplication every use; using materials with reducedinsulation properties designed to cut the cool down refrigeration timefor the cheese in half; reducing the number of container parts; andreducing the cost to manufacture compared to current market containers.

FIG. 1 is a diagrammatic representation of an isometric exploded view ofone embodiment of a cheese box 100. Cheese box 100, according to oneembodiment, includes a base 102 that acts as the bottom of a cheesemold, four wall panels (e.g., wall panel 104, wall panel 106, wall panel108 and wall panel 109) and a pressboard 110 and a lid 111. Base 102,wall panels 104, 106, 108 and 109, pressboard 110 and lid 111 can eachbe a single piece of molded plastic such as filled polypropylene (e.g.,polypropylene filled with calcium carbonate for rigidity), polyethylene,polypropylene or other plastic known in the art formed using lowpressure gas assist injection molding or other plastic formingtechniques. Preferably, the plastic is safe for use in the foodindustries. The base 102, four wall panels 104, 106, 108 and 109 andpressboard 110 can act as a cheese mold to shape a block of cheese.Cheese box 100, according to one embodiment, can be a rectangular boxsuch that there are long wall panels 104 and panels 106 and short wallpanels 108 and 109, though other embodiments can have other shapes.

Base 102 can be a single piece of molded, plastic and can include drainholes 112 to allow drainage from cheese box 100 (additional drain holesare shown in FIG. 5). Base legs 114 can support cheese box 100. Baselegs 114 can be spaced such that a fork lift can place its fork undercheese box 100 from the sides or at an angle (e.g., with the forkstraddling one of the base legs 114 from the corner). For example, baselegs 114 can be spaced to allow a fork lift to lift cheese box 100 fromthe long side (e.g., with fork lift facing long wall 104) as well as ona 45° angle from the long side and short side (e.g., with the fork liftfacing the corner between long wall 104 and short wall panel 108). A setof base ribs 115 on the bottom surface of base 102 to prevent or reducedeflection in base 102. Base ribs 115 can run the length of theunderside of base 102 to form a grid-like pattern on the underside ofbase 102. A lip 116 extending from base 102 aids in aligning the wallsections near the periphery of base 102. Lip 116 can be a portion of acontinuous lip or a one of several disjoint lips.

Each wall section can include a relatively smooth inner side and ribbedouter side. In the example of FIG. 1, wall section panel 108 includesinner side 120 and outer side 122 with ribs 124. In this embodiment, theribs include spaced horizontal and vertical ribs to form a grid patternon outer side 122. The ribs can be spaced so that the pockets formed bythe ribs (e.g., area 125) are at least three times as long as they aredeep. This allows for easy cleaning in a washing machine.

According to one embodiment, the wall sections are joined together usinga hook and receiver, discussed in conjunction with FIGS. 2-3. In theexample of FIG. 1, long wall panel 104 includes a set of hooksprotruding from its end faces, such as hook 126 a extending from endface 127. Short wall panel 108 includes complementary hook receivers,such as hook receiver 130 a to receive hook 126 a. Each hook receivercan include an opening through the inner side of the wall panel throughwhich a hook can pass over hook can pass. The hook hooks on a receiverrib on the bottom of and running the width of the opening. By way ofexample, hook 126 a can be pass through the opening of the correspondingreceiver 130 a and lower so that the portion of the hook 126 a facingthe end face 127 of long wall panel 104 (i.e., an inner surface of hook126 a) hooks to the outer surface side of the receiver rib of receiver130 a.

Pressboard 110 can be a free floating section with a smooth innersurface and ribbed outer surface. Lid 111 can be placed over pressboard110 and can mate with wall panel 104, panel 106, panel 108 and panel109. Leaf springs 132 between lid 111 and pressboard 110 presspressboard 110 down against the cheese when cheese is in box 100. Leafsprings 132, according to one embodiment, are made of stainless steel toallow ease of cleaning and many years of use. They are configured toprovide pressure fully compressed flat or with only 0.5″ of deflection.Leaf springs 132, like the rest of box 100, do not require stripping andrecoating of wax each trip. The leaf springs 132 also stack nested forease of handling and compact return shipment.

The outer surface of pressboard 110 can have alignment features to aidin placing the leaf springs 132 when cheese box 100 is assembled. Lid111 can include alignment features defined in the outer surface of lid111 that receive the legs of another cheese box. This allows cheeseboxes to be easily stacked for shipping and storage.

In operation, the side walls can be coupled together using the hooks andrespective receivers. For example, hook 126 a of long wall panel 104 canbe inserted into receiver 130 a of short wall panel 108 so that hook 126a passes over the receiver rib of receiver 130 a. Long wall panel 104can be pressed down so that the 126 a engage with the back or outer sideof the receiver rib. Protrusions on the hook and detents on the receiverrib can aid in preventing vertical movement of the sidewalls relative toeach other.

In one embodiment, the assembled wall panels can be placed upside-down(e.g., on a dolly). By way of example, but not limitation, up to 700lbs. of compacted curd is placed in the cavity formed by the sidewallswhich are resting upside down. The cheese is then pressed. The sidewalldesign with a smooth inner surface allows the liquid whey to drain offand be reclaimed. Base 102 is placed on the sidewalls. In thisconfiguration, the cheese container is upside down. The loaded assemblyis then inverted so the base is on the bottom (i.e., the cheesecontainer is inverted so that base 102 is on the bottom). Pressboard 110is then placed inside the side walls on top of the cheese. Pressboard110 has molded in alignment features that allow placement of the leafsprings 132 that are placed on pressboard 110. Lid 111 is placed on topof leaf springs 132 to compress the leaf springs 132. Lid 111 is forceddown to compress the leaf springs 132 and secured with banding.

The cheese will continue to drain whey and holes in the sidewalls andbase are designed to allow the whey to run off for reclamation. Thecheese can be refrigerated and shipped in the container to a cheeseprocessor. Box 100 is opened by cutting the band/straps, removing thelid 111, springs 132 and pressboard 110. To disassemble the remainder ofbox 100, a small prying device, such as screwdriver, can be placed underthe end of one of the hooks and the hook forced upward. This will causethe wall panel to which the hooks are attached (e.g., long wall panel104) to move up relative the wall panel including the hook receiver(e.g., short wall panel 108) (illustrated in FIG. 4). When the hookshave been disengaged from the receiver ribs, the wall panels can beseparated. Lids, pressboards and wall panels from multiple cheesecontainers can then be stacked. The bases for the multiple cheesecontainers can also be stacked. According to one embodiment, the basesare stacked by crisscrossing the bases. In other words, when a base isstacked on top of another base, the upper base is aligned such that thelong axis of the upper base is perpendicular to the long axis of thelower base. The container can be returned to the cheese manufacturer inits broken down form.

FIG. 2 is a diagrammatic representation of one embodiment of a hook 126a protruding from end wall 127 of wall panel 104 and a hook receiver 130a defined in wall panel 108. It should be noted that the end face ofwall panel 108 has been removed to provide a profile of the hookreceiver 130 a. Receiver 130 a includes an opening through inner surfaceof wall panel 108 through which hook 126 a passes. Receiver 130 a alsoincludes a receiver rib 202 that includes a detent 204 on its outerside. Receiver rib 202 can span the entire width of the opening of hookreceiver 130 a. Hook 126 a includes a protrusion 206 on an innersurface.

FIG. 3 is a diagrammatic representation of hook 126 in place in hookreceiver 130 a. Initially, hook 126 passes through the opening in theinner side surface of wall panel 108 and over hooking tab 202. When wallpanel 104 is moved down, hook 126 a hooks on the back of receiver rib202 and protrusion 206 is captured by detent 204. Hook 126 a can beresilient enough so that hook 126 a moves to a position in whichprotrusion 206 rests in detent 204. Relative horizontal movement of wallpanel 104 and wall panel 108 is prevented by the contact of the hookwith the outer side face of hooking tab 202. Relative vertical movementis impeded by detent 204 and protrusion 206.

It should be noted that other embodiments of a hook and hook receivercan be utilized. For example, hook receiver 130 a can includeprotrusions on receiver rib 202 and hook 126 a can include an indent toreceive the protrusion of hooking tab 202. As another example, otherhooks and complimentary receiver ribs may not include a protrusion anddetent. In other words, relative vertical movement of the wall panelsmay be impeded at a subset of the hooks and hook receivers whilefriction impedes vertical movement at other hooks and hook receivers.

The four side panels act as an independent form in the cheese process.They are held together, according to one embodiment, without movingparts or hardware (or with minimally moving parts) using a hook andreceiver type edge joint. The hooks on the long wall panel and thereceiver ribs on the short allow for locking and unlocking in a verticalmotion, while the container remains substantially rigid and square inthe horizontal directions. The hooks and respective receivers can beconfigured to equal strength in both the long and short wall panels byequalizing the amount of material wall panels by equalizing the amountof material commissioned at the joint.

FIG. 4 is a diagrammatic representation of one embodiment ofdisassembling a box 100. In the embodiment of FIG. 4, a small pryingdevice, such as a flat head screwdriver 400 is placed between the end ofa hook (e.g., hook 126 a) and the base of the complimentary hookreceiver (e.g., hook receiver 130 a). When the hook is pried up, longwall 104 moves up relative to short wall 108. Long wall 106 (shown inFIG. 1) can be pried similarly. When the hooks have disengaged from therespective receiver ribs, short wall 108 can be pulled away from thelong walls.

FIG. 5 is a diagrammatic representation of one embodiment of a base 102.Base 102 can be a single piece of molded plastic and can include drainholes 112 to allow drainage from cheese box 100. Base legs 114 cansupport cheese box 100. Base legs 114 can be spaced such that a forklift can place its fork under cheese box 100 from the sides or at anangle (e.g., with the fork straddling one of the base legs 114 from thecorner). For example, base legs 114 can be spaced to allow a fork liftto lift cheese box 100 from the long side (e.g., with fork lift facinglong wall 104) as well as on a 45° angle from the long side and shortside (e.g., with the fork lift facing the corner between long wall 104and short wall panel 108). A set of base ribs 115 on the bottom surfaceof base 102 to prevent or reduce deflection in base 102. Base ribs 115can run the length of the underside of base 102 to form a grid-likepattern. Lip 116 extending upward at the edge of base 102 aids inaligning the wall sections near the periphery of base 102. Lip 116 canbe a portion of a continuous lip or a one of several disjoint lips. Asshown in the embodiment of FIG. 5, lip 116, in this embodiment is acontinuous lip that is “wave” shaped for a portion of the long side ofbase 102.

FIG. 6 is a diagrammatic representation of one embodiment of long wallpanel 104. Long wall panel 104 can include a number of vertical andhorizontal ribs (e.g., rib 602 and rib 604) laid out in a gird-likeconfiguration. The ribs help minimize bulging of the container understress. The inside surface of long wall panel 104 can be smooth to shapethe cheese. Extending from each end surface of wall panel 104, in theembodiment of FIG. 6, is a column of molded hooks (e.g., hook 126 aextending from end wall 127). The hooks, as discussed above, connect toa short side wall at respective hook receivers.

FIG. 7 is a diagrammatic representation of short side wall panel 108.Wall panel 108 can include a hook receiver (e.g., hook receiver 130 a)to receive a hook. Hook receiver 130 includes an opening through theinner surface of wall panel 108 and, in the embodiment shown in FIG. 7,the outer surface of wall panel 108. Hook receiver 130 a includes areceiver rib 202 that spans the base of receiver 130 a. Receiver rib 202can include a detent 204 to capture a protrusion on a respective hook tominimize relative vertical movement of wall panels. Hook receiver 130 acan be sized such that a respective hook (e.g., hook 126 a) can passthrough area 702 hooking rib 202. When the hook moves downward, the hookwill engage hooking rib 202.

FIG. 8 a is a diagrammatic representation of one embodiment of the topsurface of the inner surface of lid 111. As can be seen in theembodiment of FIG. 8, the inner surface of lid 111 can define a cavityhaving lip 802 that fits on the outside of the wall panels when box 100is assembled. Lip 802 around the perimeter of the lid 111 encloses thetop edges of the wall panels so that the container forms a barrieraround the cheese.

Inner surface 100 can further include a set of generally perpendicularribs (e.g., rib 803 and 804) defined in at least a portion of the cavityof lid 111. The ribs are laid out, in the embodiment of FIG. 8 a, toform a set of load cells on the inner surface of lid 111 to help preventlid 111 from bulging under load. Thus, according to one embodiment, lid111 is a one piece molded component with an a internal rib structure toavoid bowing under stress.

FIG. 8 b is a diagrammatic representation of one embodiment of the topof lid 111. According to one embodiment, the top of lid 111 includes araised surface 808 that is substantially smooth. At the four corners,lid 111 can include leg receivers to align legs of another cheese box sothat the cheese boxes can be stacked. The leg receivers, according tothe embodiment of FIG. 8 b are formed by lower surfaces 810 sized toallow the leg of another cheese container to rest thereupon. Ribs (e.g.,ribs 812) extending upwards from the edge of lid 111 prevent a stackedcheese container from sliding. According to one embodiment, up to fourcontainers can be stacked on top of the bottom container for storage.Lid 111 can also include strap guides 814 to align banding straps.

FIG. 9 is a diagrammatic representation of one embodiment of apressboard 110. The inner surface of pressboard 110 can be smooth tomold the block of cheese, while the upper surface can be ribbed toprevent or reduce bowing. The upper surface of pressboard 110 can springaligners (indicated, for example, at 902) to align leaf springs 132.These alignment features can include, for example, small lips or shelvesunder which the end of a leaf spring can fit. According to anotherembodiment, the spring aligners may simply be an area at which the endsof the leaf springs rest. In the Example of FIG. 9, leaf springs 132 arelaid out such that one of leaf springs 132 straddles the center ofpressboard 110, however other patterns can be used.

FIG. 10 is a diagrammatic representation of one embodiment of anassembled cheese box 100 according to one embodiment of the presentinvention. As shown in the embodiment of FIG. 10, metal or plastic bands1000 and 1002 can be used to band cheese box 100. The bands can rununder base 102 and over lid 111. This holds lid 111 down against theleaf springs to Pressboard 110 down on the cheese during storage andshipment. By way of example, but not limitation, box 100 can be sized tohold a cheese block that is 28 inches wide, 22 inches deep and 28 incheshigh.

It should be noted that embodiments provided above are provided by wayof example and the present invention can include other embodiments aswould be understood by those in the art. For example, particularsidewalls can have hooks on one end and receivers on the other end, twoof the sidewall can have a different length than the other two sidewalls(e.g., the container can be square or rectangular). Moreover, thereceivers and hooks can have a variety of configurations that allow forconnection between the various sidewalls.

While the present invention has been described with reference toparticular embodiments, it should be understood that the embodiments areillustrative and that the scope of the invention is not limited to theseembodiments. Many variations, modifications, additions and improvementsto the embodiments described above are possible. It is contemplated thatthese variations, modifications, additions and improvements fall withinthe scope of the invention as detailed in the following claims.

1. A container for transporting cheese, comprising: a base; four solidwall panels mounted on the base, each side wall panel comprising aninner surface, an outer surface and two end faces; a lid adapted to fitover the wall panels; wherein a first two of the wall panels comprise aset of hooks protruding from the end faces and a second two of the wallpanels comprise hook receivers inset from the ends of the second two ofthe wall panels so that a portion of the inner surfaces of the secondtwo of the wall panels overlap the end faces of the first two of thewall panels when the container is assembled; wherein each hook receiverdefines an opening through a corresponding wall panel inner surface andcomprises a receiver rib spanning the width of the opening, the receiverrib having an outer face to engage an inner face of the respective hookand wherein each hook receiver is adapted so that the respective hookpasses through the corresponding wall panel to hook to the outside ofthat wall panel; wherein at least one receiver rib comprises a detent onthat receiver rib's outer face and the respective hook comprises aprotrusion on the hook's inner face adapted so that the protrusion anddetent engage through a vertical sliding movement; and wherein eachopening and receiver rib is sized to allow a portion of the respectivehook to pass over the receiver rib.
 2. The container for transportingcheese of claim 1, wherein the detent and protrusion are adapted toinhibit vertical movement of connected wall panels relative to eachother.
 3. The container for transporting cheese of claim 2, wherein atleast a portion of the protrusion rests in the detent when the containeris assembled.
 4. The container for transporting cheese of claim 1,further comprising: a pressboard; and a plurality of springs contactingthe pressboard and the lid.
 5. The container of claim 4, wherein thepressboard further comprises a smooth bottom surface and a ribbed topsurface.
 6. The container of claim 5, wherein the ribbed top surfacecomprises spring aligners.
 7. The container of claim 6, wherein each ofthe plurality of springs is a leaf spring.
 8. The container of claim 7,wherein the plurality of springs comprise five springs, wherein one ofthe five leaf springs is over a center of the pressboard.
 9. Thecontainer of claim 4, wherein the lid comprises an internally ribbedstructure.
 10. The container of claim 1, wherein the lid comprises a topface with corners, the top face having a smooth raised center portioncomprising a majority of the top face and transitioning to a pluralityof lower portions located proximate to the corners of the lid such thatthe center portion of the top face is raised compared the lowerportions.
 11. The container of claim 10, wherein the lid furthercomprises a substantially vertical rib at to an outside of each lowerportion placed to limit horizontal movement of a leg of a stackedcontainer resting on the corresponding lower portion.
 12. The containerof claim 1, wherein the outer surface of each wall panel is ribbed. 13.A container for transporting cheese substantially formed from moldedplastic, comprising: a base having at least one upwardly extending baserib; four solid wall panels mounted on the base and aligned by the atleast one upwardly extending base rib, each wall panel comprising aninner surface, a ribbed outer surface and two end faces; a lid having atop face with corners and an outer lip and defining a cavity, whereinthe outer lip of the lid fits on the outside of the four wall panelswhen the lid is in place; a plurality of leaf springs contacting anunderside of the lid; a pressboard having a top surface contacting theplurality of leaf springs; wherein a first two of the wall panelscomprise a set of hooks protruding from the end faces and a second twoof the wall panels comprise hook receivers inset from the end faces ofthe second two of the wall panels so that a portion of the innersurfaces of the second two of the wall panels overlap the end faces ofthe first two of the wall panels when the container is assembled;wherein each hook receiver defines an opening through a correspondingwall panel inner surface and a receiver rib spanning the width of theopening, the receiver rib having an outer face to engage an inner faceof the respective hook; wherein each hook receiver is adapted so thatthe respective hook passes through the corresponding wall panel to hookto the outside of that wall panel in a position that does not protrudefrom the outer surface of that wall panel; wherein at least one receiverrib comprises a detent on that receiver rib's outer face and therespective hook comprises a protrusion on the hook's inner face adaptedwherein the protrusion and detent engage through a vertical slidingmovement; and wherein each opening and receiver rib is sized to allow atleast a portion of the respective hook to pass over the receiver rib.14. The container of claim 13, wherein the detent and protrusion areadapted to inhibit vertical movement of connected wall panels relativeto each other.
 15. The container of claim 14, wherein at least a portionof the protrusion rests in the detent when the container is assembled.16. The container of claim 15, wherein the lid comprises an internallyribbed structure.
 17. The container of claim 13, wherein the top facecomprises a smooth raised center portion comprising a majority of thetop face and transitioning to a plurality of lower portions locatedproximate to the corners of the lid such that the center portion of thetop face is raised compared the lower portions.
 18. The container ofclaim 17, wherein the lid further comprises a substantially vertical ribat each lower portion placed to limit horizontal movement of a leg of astacked container resting on the corresponding lower portion.
 19. Thecontainer of claim 18, wherein the pressboard comprises a set of springaligners to align the plurality of leaf springs, wherein at least oneleaf spring is aligned to straddle a center of the pressboard.